Process for manufacturing of a fibre-reinforced polymer composition

Patent metadata

Field	Value
Publication number	US-10792837-B2
Application number	US-201615571773-A
Country	US
Kind code	B2
Filing date	May 20, 2016
Priority date	May 22, 2015
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

Process for producing a fibre-reinforced polymer composition comprising the following steps: a) providing a polymer composition, b) melting the polymer composition in a compounding device, c) feeding a non-woven fabric into the compounding device in the presence of the molten polymer composition, and d) withdrawing the fibre-reinforced polymer composition from the compounding device. Furthermore, the product obtained by the process and the use of a non-woven fabric in an extruder to reinforce a polymer with fibres are disclosed.

First claim

The invention claimed is:

1. A process for producing a fibre-reinforced polymer composition comprising the following steps:
a) providing a polymer composition (A);
b) melting the polymer composition (A) in a compounding device;
c) feeding a non-woven fabric into the compounding device in the presence of the molten polymer composition (A), wherein the non-woven fabric comprises at least 75 wt. % carbon fibres based on the total weight of the non-woven fabric; and
d) withdrawing the fibre-reinforced polymer composition from the compounding device.

2. The process according to claim 1 , wherein the compounding device is an extruder.

3. The process according to claim 1 , wherein the non-woven fabric is fed into the compounding device through a side feed port.

4. The process according to claim 1 , wherein the non-woven fabric further comprises glass reinforcing fibres.

5. The process according to claim 1 , wherein the non-woven fabric is in the form of a stripe.

6. The process according to claim 5 , wherein the stripe has a width of 10 to 300 mm.

7. The process according to claim 5 , wherein the stripe has a length of at least 50 cm.

8. The process according to claim 1 , wherein the average weight of the non-woven fabric is within the range of 100 to 1000 g/m 2 .

9. The process according to claim 1 , wherein the polymer composition (A) comprises a polyolefin.

10. The process according to claim 9 , wherein the content of the polyolefin is at least 50 wt. % based on the polymer composition (A).

11. The process according to claim 9 , wherein the polymer composition (A) comprises a polypropylene.

12. The process according to claim 1 , wherein a compatibilizer is added prior to step c).

13. The process according to claim 1 , wherein the non-woven fabric is obtained by needle-punching.

Assignees

• Borealis Ag

Inventors

• Hochradi Stefan
• Stockreiter Wolfgang
• Wurm Karl
• Gubo Robert

Classifications

• B29C48/156

  Coating two or more articles simultaneously · CPC title

• B29B7/48 Primary

  with intermeshing devices, e.g. screws · CPC title

• C08F10/06

  Propene · CPC title

• C08L23/12

  Polypropene · CPC title

• B29C48/03

  characterised by the shape of the extruded material at extrusion · CPC title